Abstract: The present invention relates to a fine grained WC-Co cemented carbide. By adding an extremely small amount of Ti, V, Zr, Ta or Nb alone or in combinations, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.

Abstract: The present invention relates to a method of making a cemented carbide comprising mixing in a slurry a first powder fraction and a second powder fraction, subjecting the slurry to milling, drying, pressing and sintering. The first powder fraction is made from cemented carbide scrap recycled using the Zn recovery process, comprising the elements W, C, Co, and at least one or more of Ta, Ti, Nb, Cr, Zr, Hf and Mo, and the second powder fraction comprising virgin raw materials of WC and possibly carbides and/or carbonitrides of one or more of Cr, Zr, W, Ta, Ti, Hf and Nb. The first powder fraction is subjected to a pre-milling step, prior to the step of forming the slurry, to obtain an average grain size of between 0.2 to 1.5 ?m.

Abstract: The present invention relates to a diamond composite comprising diamond particles embedded in a binder matrix comprising SiC and a Mn+1AXn-phase, where no diamond-to-diamond bonding are present. For the Mn+1AXn-phase n=1-3, M is one or more elements selected from the group Sc, Ti, Zr, Hf, V, Nb, Ta, Cr and Mo, A is one or more elements selected from the group Al, Si, P, S, Ga, Ge, As, Cd, In, Sn, Tl, and Pb and X is carbon and/or nitrogen.

Abstract: A sintered cutting element including a superabrasive layer supported on a substrate. The superabrasive layer includes superabrasive material and secondary phase, and the substrate includes a binder phase. The sintered cutting element is formed by a high temperature high pressure sintering process in which separate source elements melt and sweep first through the superabrasive layer, and then to the substrate to form the secondary phase and binder phase. The superabrasive layer is substantially free of or free of eta-phase, Co3W3C. Further, the portion of the substrate nearest the interface between the superabrasive layer and the substrate has equal or more binder phase than portions of the substrate further from the interface. In certain embodiments, the superabrasive material includes polycrystalline diamond, and the substrate includes cobalt tungsten carbide.

Abstract: An alloy having from about 5 to about 15 wt % Ta, from 0 to about 5 wt % Nb, from about 0.5 to about 15 wt % Zr, and the balance Ti is disclosed. The alloy is particularly intended for medical devices, such as implants for the body.

Abstract: The present invention relates to PVD coated cemented carbide cutting tool inserts semifinishing and finishing metal cutting operations. The cemented carbide cutting tool insert comprises a substrate and a wear resistant coating. The substrate comprises in addition to WC, from about 5.5 to about 8.5 wt-% Co and Cr such that the Cr/Co weight ratio is from about 0.08 to about 0.12 and also small amounts of Ti and Ta. The wear resistant coating is a homogeneous AlxTi1?xN-layer with x equals from about 0.6 to about 0.67. The thickness of this layer is from about 1 to about 3.8 ?m.

Abstract: There is disclosed a method of making a ready to press cemented carbide powder with low compaction pressure suitable for the production of submicron cemented carbide by means of powder metallurgical techniques milling, pressing and sintering. The method comprises using from about 1 to about 3 wt-% pressing agent with the following composition, less than about 90 wt-% PEG and from about 10 to about 75 wt-% of blends of high molecular (C12-<C20) saturated or unsaturated fatty acids, or salts thereof containing at least one element of Al, Ba, Ca, Co, Cr, Mg, N, Na, V, Zn. Preferably the grain size of the cemented carbide powder is submicron. In a preferred embodiment the method includes a dry pre-milling of the hard constituents mainly WC-powder for about 2-45 hours in ball mills with cemented carbide milling bodies or using other suitable dry milling techniques prior to a wet milling step. The invention also relates to the powder obtained by the method.

Abstract: The present invention relates to a cuffing insert for turning in heat resistant superalloys and stainless steels comprising a very fine grained hard substrate and a coating. The substrate comprises WC from about 5 to about 8 wt % Co and from about 0.3 to about 1.5 wt % Cr. In addition to that ppm levels of Ti and Ta are present. The ratio of Me/Co=(at-% Ti+ at-% Nb+ at-% Ta)/at-% Co is lower than or equal to about 0.014?(CW_Cr)*0.008 and higher than about 0.0005. The average sintered WC-grain size is from about 0.5 to about 0.95 ?m and CW_Cr from about 0.75 to about 0.95. The cemented carbide body is coated with a PVD TixAl1-xN-coating with an average composition of x being greater than about 0.4 but less than about 0.9, present as a single or multilayer coating with a total thickness of from about 1 to about 6 ?m.

Abstract: A cemented carbide including WC, a binder phase based on Co, Ni or Fe, and gamma phase, in which said gamma phase has an average grain size <1 ?m. A method of making the cemented carbide is provided in which the powders forming gamma phase are added as mixed cubic carbides of one or more of Ti, Ta, Nb, Zr, Hf and V, and a ratio, fWC, between an amount of WC (in mol fraction of WC) and an equilibrium gamma phase WC content at a sintering temperature (in mol fraction WC) is given by fWC=xWC/xeWC, wherein fWC is 0.6 to 1.0.

Abstract: A sintered cutting element including a superabrasive layer supported on a substrate. The superabrasive layer includes superabrasive material and secondary phase, and the substrate includes a binder phase. The sintered cutting element is formed by a high temperature high pressure sintering process in which separate source elements melt and sweep first through the superabrasive layer, and then to the substrate to form the secondary phase and binder phase. The superabrasive layer is substantially free of or free of eta-phase, Co3W3C. Further, the portion of the substrate nearest the interface between the superabrasive layer and the substrate has equal or more binder phase than portions of the substrate further from the interface. In certain embodiments, the superabrasive material includes polycrystalline diamond, and the substrate includes cobalt tungsten carbide.

Abstract: The present invention discloses a coated cutting tool insert particularly useful for dry and wet machining, preferably milling, in low and medium alloyed steels, stainless steels, with or without raw surface zones under severe conditions such as vibrations, long overhang and recutting of chips. The insert is characterized by WC—Co cemented carbide with a W and Cr alloyed Co-binder phase and a coating including at least three TiCxNyOz layers and a top layer at least on the rake face of a smooth ?-Al2O3.

Abstract: The present invention relates to a fine grained WC-Co cemented carbide. By adding an extremely small amount of Ti, V, Zr, Ta or Nb alone or in combinations, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.

Abstract: The present invention relates to a WC—Co cemented carbide alloy. By adding an extremely small amount of Ti, V, Zr, Ta or Nb or a combination of these, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.

Abstract: The present invention relates to a fine grained WC-Co cemented carbide. By adding an extremely small amount of Ti, V, Zr, Ta or Nb alone or in combinations, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.

Abstract: The present invention relates to a coated cemented carbide comprising WC, a binder phase based on Co, Ni or Fe and gamma phase and with a binder phase enriched surface zone essentially free of gamma phase. The gamma phase has an average grain size less than about 1 ?m. In this way a binder phase enriched cemented carbide with improved toughness and essentially unchanged resistance against plastic deformation is obtained.

Abstract: A coated cutting tool includes a coating and a substrate. The substrate is at least partly coated with a 4-10 ?m thick coating comprising two adjacent Ti(C,N)-layers where the difference (?) between the residual stress state of the inner layer and the residual stress state of the outer layer is 1000 MPa???2500 MPa, on at least a part of the cutting edge and/or on at least a part of the rake face. A method to produce such a difference between the residual stress states is also disclosed.

Abstract: The present invention relates to a cutting tool insert for turning consisting of a cemented carbide substrate and a coating. The cemented carbide substrate comprises WC, binder phase, and vanadium containing cubic carbide phase with a binder phase enriched surface zone essentially free of cubic carbide phase. The thermal properties of the vanadium-containing cubic phase, has turned out to give excellent resistance to thermal cracking of the insert.

Abstract: A cemented carbide tool comprising hard constituents in a binder phase of Co and/or Ni and at least one surface portion and an interior portion in which surface portion the grain size is smaller than in the interior portion is disclosed. The surface portion with the fine grain size has a lower binder phase content than the interior portion. A method to form the cemented carbide cutting tool is also disclosed.

Abstract: An alloy having from about 5 to about 15 wt % Ta, from 0 to about 5 wt % Nb, from about 0.5 to about 15 wt % Zr, and the balance Ti is disclosed. The alloy is particularly intended for medical devices, such as implants for the body.

Abstract: A cemented carbide cutting tool insert/button for mining and construction comprising hard constituents in a binder phase of Co and/or Ni and at least one surface portion and an interior portion in which surface portion the grain size is smaller than in the interior portion is disclosed. The surface portion with the smaller grain size has a lower binder phase content than the interior portion. A method to form the cemented carbide cutting tool insert/button is also disclosed.